NIXPKG1 http://releases.strategoxt.org/pgen-with-aterm64/pgen-2.8.1pre26912-m019rfqv/MANIFEST pgen-2.8.1pre26912 x86_64-linux /nix/store/7w5cfya15dqj2rvaxyshc76njz3jjqns-pgen.drv /nix/store/z73jmq27zr5hj60y2n85v2y3ql6jw25q-pgen